LMM GROUP main products focus on the cold and hot plate & wide strip mill rolls and heavy section mill rolls and big casting & forging pieces. ... Cast steel mill rolls Alloy cast steel rolls; Semi-steel roller; ... Product advantage. The world No. 1 in crude steel production steel plant, over 70% of the HSS for bar and wire are from us. …
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The trial data shows that the ∮370mm high-speed steel roll produced by LMMGROUP has far exceeded the single-groove assessment value of 1,500 tons in the "Roll Ordering Technical Agreement", and the effect is good. On September 10, 2015, in the rolling process of the steel rolling mill, the LMMGROUP high-speed steel bar rolling experiment ...
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The centrifugal casting process allows to produce bimetallic rolls where the external layer is made in a very hard steel with optimal mechanical properties. These steels, called semi …
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Defects in the use of cold-rolled rolls will cause the quality of batches to be degraded or even scrapped, resulting in lower yields and possibly damage to related equipment. This largely affects product quality and production rhythm. Roll surface defects mainly include chatter marks, roll marks, knives, cracks and spalling, which will affect ...
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LMM chill iron rolls have an excellent combination of metallurgical and physical properties with uniform and stable hardness ensuring the highest quality of cold-rolled strip and efficient performance characteristics (resistance to wear, thermal shocks, fatigue contact cracks).Chilled cast iron rolls are mainly suitable for Section mill、bar mill …
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hot rolling mill rolls Professional Rolling mill rolls manufacturer with 20 years of production experience. mainly produces all kinds of metallurgical rolls for various types of steel, bar, high-speed wire and strip hot and cold plate and strip rolling mills.WE can provide characteristic service and differentiated products according to the different conditions of …
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On September 10, 2015, in the rolling process of the steel rolling mill, the LMMGROUP high-speed steel bar rolling experiment was carried out on the first bar line C12 to four cuts, and C14 three cuts to K1, K2, K3, and K4.
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LMM Work rolls have an excellent combination of metallurgical and physical properties with uniform and stable hardness ensuring the highest quality of cold-rolled strip and efficient performance characteristics (resistance to wear, thermal shocks, fatigue contact cracks).
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New Type Cold Work Rolls with High Roughness Retention Ability. Work Roll for High Class and High Strength Plate Mil. Cold Work Rolls for High Class Automobile Sheet. …
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3) Forged semi-high-speed steel cold rolls. During the actual use of cold-rolled work rolls, production accidents such as steel jamming, steel sticking, and belt breakage may occur, which will cause the local structure and hardness of the cold-rolled work roll body made of Cr3 and Cr5 series materials to change, resulting in roll surface ...
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The material of the forged semi-high-speed steel cold roll is developed on the basis of the material of the 5%Cr cold-rolled work roll. Due to the addition of a large …
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In recent years several tests have been performed with centrifugally cast bimetallic rolls as work ro lls in cold rolling. This paper outlines the exciting results from cast rolls made in a special type of alloyed steel called Semi-HSS used in a temper mill at Siderar (Argentina).
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The HSS Roll has good thermal stability、 high hardness and good wear resistance. 3. Forming oxide film during use working process,improve wear-resistant、 the strength of the roll neck is high. ... Cold strip mill rolls: …
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(1. The table illustrates the current status of most hot strip mills in Europe in terms of roll types and rolling volume in one cycle. 2.This table summarizes the data of strip rolled by carbon steel and stainless steel mills, excluding medium plate mills and coil mills. 3.The table shows the type of rolling mill, the type of work roll used for the roughing …
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It is better to use semi-steel rolls for the back-up rolls. Cold rolled strip rolls. The cold strip tandem mill consists of three to six stands, which are four-high mills with larger back-up rolls and smaller diameter work rolls. During cold rolling, emulsified oil is used to lubricate the steel strip and also to cool it.
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Particular highlights of GP's product range include work rolls in HSS and semi-HSS grades and double-poured back-up rolls with final weights of more than 200 metric tons. In addition to the manufacturing of rolls, we also offer complete after-market and consulting services, covering all aspects of the roll and its actual application in the mill.
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No1. LMM GROUP Chinese Mill Rolls Manufacturer,Founded in 2007, LMM GROUP mainly produces all kinds of metallurgical rolls for various types of steel, bar, high-speed wire and strip hot and cold plate and strip rolling mills. The company covers an area of 100,000 square meters, including two complete production lines for cast rolls …
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From hot to cold - covering a wide variety of needs Union Electric Åkers supplies rolls to some of the world's leading aluminum mills. We were the first roll manufacturer to introduce the 5% Cr and 10% Cr semi HSS grade with considerably improved performance for the hot mill process. Additionally, having our own ESR installation gives us the ability …
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Cast rolls are manufactured with highest standards by using static or centrifugal casting techniques by our partner foundries. High tech HSS / Tool Steel rolls and assembled …
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Cemented carbide roller The cemented carbide composite roll is mainly used on the finishing mill for bar, deformed steel bar and common wire. In this way, we can greatly reduce the frequency of changing groove and roll, thus to reduce the labor intensity and improve the work efficiency. The surface quality and yield shall be improved […]
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This paper outlines the exciting results from cast rolls made in a special type of alloyed steel called Semi-HSS used in a temper mill at Siderar. In this specific …
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In order to compensate for the change of roll shape caused by pressure and temperature, the roll must be ground into a certain arc in advance, which is generally called the roll shape of the roll. For the cold rolling mill, the pressure roll type is the main one, so the curvature selected by the roll type of the cold rolling mill is usually the ...
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LMM Work rolls have an excellent combination of metallurgical and physical properties with uniform and stable hardness ensuring the highest quality of cold-rolled strip and efficient performance characteristics (resistance to wear, thermal shocks, fatigue contact cracks).
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Rollers are key contact process equipment in strip steel production. In view of the problems existing in the processing and use of cold rolls, we improve the surface quality during the production process, reduce production costs, and ensure efficient operation of continuous production from three aspects: roll grinding, roll non-destructive …
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Two alloys grades for work rolls used in the roughing stand of Hot Strip Mill — high chromium steel (HCS) and semi-high-speed steel (semi-HSS), In this paper, the new semi-high-speed steel grade ...
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LMM Work rolls have an excellent combination of metallurgical and physical properties with uniform and stable hardness ensuring the highest quality of cold-rolled strip and efficient performance characteristics (resistance to wear, thermal shocks, fatigue contact cracks).
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The trial data shows that the ∮370mm high-speed steel roll produced by LMMGROUP has far exceeded the single-groove assessment value of 1,500 tons in the "Roll Ordering Technical Agreement", and the effect is good. On September 10, 2015, in the rolling process of the steel rolling mill, the LMMGROUP high-speed steel bar rolling experiment ...
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Semi-HSS Cold Mill Intermediate Rolls. New Type Cold Work Rolls with High Roughness Retention Ability. Work Roll for High Class and High Strength Plate Mil. Cold Work Rolls for High Class Automobile Sheet. High Wear-Resistant Work Rolls Without Chrome Plating. Roll-Mark Resistant Cold Work Roll.
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86-411-84174804. Rolling mill rolls manufacture. LMM both cast and forged rolls for the most flat hot and cold rolling applications. We are now the sole producer of both cast work rolls and backup rolls in China.
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Abstract: With the upgrading of the rolling technology and rolling mills, higher quality requirements for rolled products,and application of semi-high-speed steel & high-speed steel work rolls ( intermediate rolls ), the demands for rolling performance of backup rolls become more rigorous. In this paper,the status of the backup roll …
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